Description of the illustration dgen

dgen_fld ::= 
  
  { RECNUM 
  | SYSDATE 
  | CONSTANT val 
  | SEQUENCE [( { COUNT | MAX | integer } [, incr] )] 
  | { REF_spec init_spec | SID_spec init_spec | BFILE_spec init_spec }
  | EXPRESSION "sql_string" }